ArticleBMC genetics2017
Karyotype diversity and chromosomal organization of repetitive DNA in Tityus obscurus (Scorpiones, Buthidae).
Article in BMC genetics, 2017. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 21 papers.
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21 citing papers in PubMed, 31 citations in OpenAlex.
- Article
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- High Chromosomal Reorganization and Presence of Microchromosomes in Chactidae Scorpions from the Brazilian Amazon.Biology · 2023Article
- Chromosome diversity in Buthidae and Chactidae scorpions from Brazilian fauna: Diploid number and distribution of repetitive DNA sequences.Genetics and molecular biology · 2023Article
- Chromosomal Diversification inAnimals : an open access journal from MDPI · 2022Article
- Kinetic Activity of Chromosomes and Expression of Recombination Genes in Achiasmatic Meiosis ofInternational journal of molecular sciences · 2022Article
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- Karyotype description and comparative chromosomal mapping of rDNA and U2 snDNA sequences inComparative cytogenetics · 2022Article
- Highly divergent karyotypes and barcoding of the East African genus Gonatoxia Karsch (Orthoptera: Phaneropterinae).Scientific reports · 2021Article
- Insights into the Karyotype Evolution of Charinidae, the Early-Diverging Clade of Whip Spiders (Arachnida: Amblypygi).Animals : an open access journal from MDPI · 2021Article
- Review
- Universal fluorescence in situ hybridization (FISH) protocol for mapping repetitive DNAs in insects and other arthropods.Molecular genetics and genomics : MGG · 2021Article
- Comparative Cytogenetics Analysis AmongFrontiers in genetics · 2021Article
- Evolutionary insights in Amazonian turtles (Testudines, Podocnemididae): co-location of 5S rDNA and U2 snRNA and wide distribution of Tc1/Mariner.Biology open · 2020Article
- Karyoevolution ofBiology open · 2019Article
- Meiosis in the scorpionBiology open · 2019Article
- Mechanisms of karyotype evolution in the Brazilian scorpions of the subfamily Centruroidinae (Buthidae).Genetica · 2018Article
- Do holocentric chromosomes represent an evolutionary advantage? A study of paired analyses of diversification rates of lineages with holocentric chromosomes and their monocentric closest relatives.Chromosome research : an international journal on the molecular, supramolecular and evolutionary aspects of chromosome biology · 2018Article
- Physical mapping of repetitive DNA suggests 2n reduction in Amazon turtles Podocnemis (Testudines: Podocnemididae).PloS one · 2018Article
- Article
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Authors and funding
8 authors at 2 institutions in 1 country.
Funding
No grant is acknowledged in the PubMed record.
Abstract
backgroundHolocentric chromosomes occur in approximately 750 species of eukaryotes. Among them, the genus Tityus (Scorpiones, Buthidae) has a labile karyotype that shows complex multivalent associations during male meiosis. Thus, taking advantage of the excellent model provided by the Buthidae scorpions, here we analyzed the chromosomal distribution of several repetitive DNA classes on the holocentric chromosomes of different populations of the species Tityus obscurus Gervais, 1843, highlighting their involvement in the karyotypic differences found among them.
resultsThis species shows inter- and intrapopulational karyotype variation, with seven distinct cytotypes: A (2n = 16), B (2n = 14), C (2n = 13), D (2n = 13), E (2n = 12), F (2n = 12) and G (2n = 11). Furthermore, exhibits achiasmatic male meiosis and lacks heteromorphic sex chromosomes. Trivalent and quadrivalent meiotic associations were found in some cytotypes. In them, 45S rDNAs were found in the terminal portions of two pairs, while TTAGG repeats were found only at the end of the chromosomes. In the cytotype A (2n = 16), the U2 snRNA gene mapped to pair 1, while the H3 histone cluster and C
conclusionsChromosomal variability found in T. obscurus are due to rearrangements of the type fusion/fission and reciprocal translocations in heterozygous. These karyotype differences follow a geographical pattern and may be contributing to reproductive isolation between populations analyzed. Our results also demonstrate high mobility of histone H3 genes. In contrast, other multigene families (45S rDNA and U2 snRNA) have conserved distribution among individuals. The accumulation of repetitive sequences in distal regions of T. obscurus chromosomes, suggests that end of chromosome are not covered by the kinetochore.
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